Abstract Scope |
Molten hydroxide salts are considered for use in concentrated solar power (CSP) energy storage systems, as well as caustic off-gas scrubbing systems for advanced reactor designs due to their favorable thermophysical and chemical properties. Specifically, the use of eutectic NaOH-KOH molten salts has been explored in off-gas treatment systems due to their reactivity with fission products present in the cover-gas region of nuclear reactors. In this study, the solubility of various halogen, alkali metal, and alkali metal fission products in eutectic NaOH-KOH molten salts were examined. X-ray photoelectron spectroscopy (XPS) and inductively coupled mass spectrometry (ICP-MS) were utilized to determine solubility limits and identify precipitate species of iodine, cesium, rubidium, and strontium in eutectic NaOH-KOH molten salt at temperatures similar to those of proposed off-gas scrubbing systems. |